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Loan Receivables and Allowance for Loan Losses - Total Troubled Debt Restructured Loans Included in Impaired Loans (Detail) (USD $) | 3 Months Ended
--- | ---
Mar. 31, 2014 SecurityLoan | Dec. 31, 2013 SecurityLoan
Financing Receivable, Modifications [Line Items] |  |
Number of Loans | 3 | 2
Troubled debt restructured loan amount | $ 3,408,000 | $ 2,188,000
Troubled debt restructured loan amount | 1,800,000 | 1,891,000
Construction to Permanent [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Loans |  | 2
Troubled debt restructured loan amount |  | 2,188,000
Commercial Real Estate [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Loans | 3 |
Troubled debt restructured loan amount | 3,408,000 |
Troubled debt restructured loan amount | 17,000 | 31,000
Accrual of Loans [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Loans | 2 | 1
Troubled debt restructured loan amount | 2,128,000 | 991,000
Accrual of Loans [Member] | Construction to Permanent [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Loans |  | 1
Troubled debt restructured loan amount |  | 991,000
Accrual of Loans [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Loans | 2 |
Troubled debt restructured loan amount | 2,128,000 |
Non-Accrual of Loans [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Loans | 1 | 1
Troubled debt restructured loan amount | 1,280,000 | 1,197,000
Non-Accrual of Loans [Member] | Construction to Permanent [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Loans |  | 1
Troubled debt restructured loan amount |  | 1,197,000
Non-Accrual of Loans [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Modifications [Line Items] |  |
Number of Loans | 1 |
Troubled debt restructured loan amount | $ 1,280,000 |

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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953676-111524 + Details
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- Definition The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554 + Details
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- Definition Amount of allowance for credit losses related to recorded investment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5212-111524 + Details
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Balance Type: | credit
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